100-150 Question 195
Select 4A user reports that they are unable to access a critical application hosted on a server. You have verified that the server is powered on and reachable via ping from your device. Which of the following steps would help you diagnose and resolve the issue?
- A
Check if the application service is running on the server.
- B
Verify the user's device has the correct DNS settings.
- C
Use traceroute to check for network path issues between the user and the server.
- D
Restart the network switch near the user's device.
- E
Review firewall or access control list (ACL) rules for potential blocks.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
Diagnosing connectivity issues requires a methodical approach that includes verifying application status, ensuring proper configurations (e.g., DNS), checking for network path issues, and reviewing security configurations (e.g., firewall rules). Restarting devices should only be done as a last resort when there is evidence pointing to hardware or software failure.
- A. Correct.
Correct: If the application service is not running on the server, the application will not be accessible. Verifying the service status is a critical troubleshooting step.
- B. Correct.
Correct: Incorrect DNS settings on the user's device can prevent the user from resolving the server's hostname, even if the server is reachable via IP.
- C. Correct.
Correct: Traceroute can help identify network path issues, such as routing problems or packet loss, which could be affecting the user's connectivity to the server.
- D. Incorrect.
Incorrect: Restarting the network switch is a drastic step and should not be done unless there is evidence that the switch is causing the issue. It could also disrupt other users.
- E. Correct.
Correct: Firewall or ACL rules may block specific traffic between the user and the server. Reviewing these configurations can help identify and resolve access issues.